In preparation for the 2007 Hospital Quality Study and Ratings report, HealthGrades examined 40.6 million Medicare hospitalization records. The results showcased the widening gap between the best and worst performing hospitals. For example, there is a 60% lower chance of dying at one of the nation’s 5-star rated hospitals than at one of the 1-star rated hospitals. If all hospitals performed at the level of a 5-star hospital across 18 of the procedures and diagnoses studies, 302,403 Medicare lives could have potentially been saved from 2003 through 2005. 50% of the potentially preventable deaths were associated with 4 diagnoses: Heart Failure, Community Acquired Pneumonia, Sepsis, and Respiratory Failure.